Method for measuring the saturation rate of an audio amplifier
US8054130B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2010 |
| Grant date | Nov 8, 2011 |
| Priority date | — |
| Expiry date | Mar 31, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G11/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and corresponding circuit that adjusts the gain of an audio output stage having a class D amplifier, this method including the steps of setting the gain to a nominal value, analyzing an output signal during successive clock periods, counting the number of clock periods during which the signal is in a state corresponding to a saturation, decreasing the gain if the number reaches, before the end of a first time interval, a value corresponding to a first percentage, maintaining the gain constant if, at the end of a second time interval, different from the first interval, the number corresponds to a second percentage being comprised between the first percentage and a third percentage, and increasing the gain if, at the end of the second time interval, the number corresponds to a fourth percentage, lower than the third percentage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.